package com.jmex.font3d;

import java.util.logging.Level;
import com.jme.bounding.OrientedBoundingBox;
import com.jme.math.Vector3f;
import com.jme.renderer.ColorRGBA;
import com.jme.renderer.Renderer;
import com.jme.scene.SharedMesh;
import com.jme.scene.TriMesh;
import com.jme.scene.state.MaterialState;
import com.jme.system.DisplaySystem;
import com.jme.util.LoggingSystem;

/**
 * This class represents a peace of text compiled using the
 * {@link Font3D#createText(String, String, int, boolean, boolean, boolean)}.
 * 
 * @author emanuel
 */
public class Text3D extends SharedMesh implements JmeText {
    private static final long serialVersionUID = 7715674618025080804L;
    private Font3D factory;
    private float height, width;
    private float size;
    private StringBuffer text = new StringBuffer();
    private ColorRGBA fontcolor = new ColorRGBA(0.9f, 0.9f, 0.9f, 1.0f);
    private float localscale;
    //TriMesh render_mesh;
    OrientedBoundingBox render_mesh_bounds;

    public Text3D(Font3D factory, String text, float size) {
    	super("Some3DText", factory.getRenderTriMesh());
        // Save for later
        this.factory = factory;

        // Setup a render-container
        //render_mesh = new TriMesh("RenderMesh");
        render_mesh_bounds = new OrientedBoundingBox();
        //attachChild(render_mesh);
        
        // And now scale to the correct "size" (all font are size 1)
        setSize(size);

        // Ready the glyphs
        setText(text);
        
        updateRenderState();
    }

    @Override
    public void updateWorldBound() {
        worldBound = render_mesh_bounds.transform(getWorldRotation(),
                getWorldTranslation(), getWorldScale(), worldBound);
    }

    public TextFactory getFactory() {
        return factory;
    }

    public int getFlags() {
        return 0; // TODO: this should be working
    }

    public float getSize() {
        return size;
    }

    public StringBuffer getText() {
        return text;
    }

    public void setSize(float size) {
        this.size = size;
        localscale = size / factory.getFont().getSize();
        //render_mesh.setLocalScale(localscale);
        setLocalScale(localscale);
    }

    public void setText(String text) {
        // Set width and text to zip
        this.width = 0;
        this.height = 0;
        this.text.setLength(0);
        clearBatches();

        // Now append the text
        appendText(text);
    }

    public void appendText(String moretext) {
        // Create the damn things
        for (char c : moretext.toCharArray()) {
            Glyph3D glyph = factory.getGlyph(c);
            width += glyph.getBounds().getWidth() * localscale;
            height = (float) Math.max(height, glyph.getBounds().getHeight()
                    * localscale);

            if(glyph.getBatchId() != -1)
            {
            	Glyph3DSharedBatch batch = new Glyph3DSharedBatch(factory.getRenderTriMesh().getBatch(glyph.getBatchId()));
            	batch.setParentGeom(this);
            	batchList.add(batch);
            }
        }
        this.text.append(moretext);
        updateModelBound();
    }

    @Override
	public void updateModelBound() {
        render_mesh_bounds.extent.x = (width / 2) / localscale;
        render_mesh_bounds.extent.y = (height / 2) / localscale;
        render_mesh_bounds.extent.z = 0.5f; //(localscale / 2) / localscale;
        render_mesh_bounds.getCenter().x = (width / 2) / localscale;
        render_mesh_bounds.getCenter().y = (height / 2) / localscale;
    }


    private static Vector3f _direction1 = new Vector3f();
    private static Vector3f _direction2 = new Vector3f();
    private static Vector3f _direction3 = new Vector3f();
    @Override
    public void draw(Renderer r) {
		// Calculate the translation in world-space
        getWorldRotation().mult(Vector3f.UNIT_X, _direction1 ).multLocal( getWorldScale());

        //attachChild(factory.getRenderTriMesh());
        //factory.getRenderTriMesh().setDefaultColor(fontcolor);
        //factory.getRenderTriMesh().updateRenderState();
        //factory.getRenderTriMesh().getWorldRotation().set(getWorldRotation());
        //factory.getRenderTriMesh().getWorldTranslation().set(getWorldTranslation());
        //factory.getRenderTriMesh().getWorldScale().set(getWorldScale());
        
    	Glyph3DSharedBatch batch;
    	_direction2.set(getWorldTranslation());
    	int batchcounter = 0;
        for (int i = 0; i < text.length(); i++) {
            char c = text.charAt(i);
            // Get glyph and set translation
            Glyph3D glyph = factory.getGlyph(c);

            if(glyph.getBatchId() != -1)
            {
                //batch = (Glyph3DSharedBatch) getBatch(glyph.getBatchId());
                //batch.glyph_offset.set(_direction2);
            	//batch.onDraw(r);
            	batch = (Glyph3DSharedBatch) getBatch(batchcounter++);
                batch.glyphTranslation.set(_direction2);
            	batch.onDraw(r);
            }
            float trans = (float) (glyph.getBounds().getWidth());

            //getWorldTranslation().addLocal(_direction1.mult(trans, _direction3));
            //factory.getRenderTriMesh().getWorldTranslation().addLocal(_direction1.mult(trans, _direction3));
            _direction2.addLocal(_direction1.mult(trans, _direction3));
        }
        //updateWorldVectors(); // Clean up
    }
    
    
	/**
	 * <code>setTarget</code> sets the shared data mesh.
	 * 
	 * @param target
	 *            the TriMesh to share the data.
	 */
	public void setTarget(TriMesh target) {
		//super.setTarget(target);
		batchList.clear();
		/*
        // Replace with our own and improved shared meshes...
		batchList.clear();
        for (int x = 0, max = target.getBatchCount(); x < max; x++) {
            Glyph3DSharedBatch batch = new Glyph3DSharedBatch(target.getBatch(x));
            batch.setParentGeom(this);
            batchList.add(batch);
        }
        */
	}
	
    /**
     * <code>applyRenderState</code> determines if a particular render state
     * is set for this Geometry. If not, the default state will be used.
    protected void applyRenderState(Stack[] states) {
    	//System.out.println("Apply renderstates !"+this);
    	attachChild(factory.getRenderTriMesh());
    	super.applyRenderState(states);
    }
     */
    
    

    public ColorRGBA getFontColor() {
        return fontcolor;
    }

    public void setFontColor(ColorRGBA fontcolor) {
    	this.fontcolor.set(fontcolor);
    	if(!factory.has_diffuse_material)
    	{
	        MaterialState ms = DisplaySystem.getDisplaySystem().getRenderer().createMaterialState();
	        ms.setDiffuse(fontcolor);
	        ms.setEnabled(true);
	        setRenderState(ms);
    	}
    	else
    	{
    		LoggingSystem.getLogger().log(Level.WARNING, "You cannot set the font-color on "+
    				"Text3D when the Font3D has a font color already.");
    	}
    }

    public float getWidth() {
        return width;
    }

    /**
     * Just a hack that positions the text with its center in the origo (only on the X-axis).
     */
	public void alignCenter()
	{
		getLocalTranslation().x = -width/2;
		updateWorldVectors();
	}

}
